This PR modifies the build process to generate two docker images; the
standard image, and one with MariaDB embedded into it for one click
installs.
This embedded MariaDB image is meant to support users on systems like
Unraid that don't easily support docker-compose.
Also; for users on Unraid, it will allow the creation of a single click
install template to be submitted to the Unraid marketplace (this will be
done at a later date after the release of 1.7.4).
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